how to apply medicated shampoo and in how much quantity
i have long hair and painfully section one by one my hair to apply shampoo. i also double shampoo with a mild sulphate and paraben shampoo. how much quantity do you use? i have certain areas on my scalp where I have flakes in my scalp and whenever my hair sheds from there it has white stuff attached on the root or near the root. my scalp is also really painful to touch. please help how much shampoo should I use and how? my derm said to use a coin sized amount but that isn't enough and not using a scalp scrubber because i have intense shedding. last wash I lost almost close to 700 hairs and I am spooked. i know its bad I went 2 days with ko shampoo instead of the daily washing i do. currently I am using selenium sulphide 2.5% thrice a week because ketaconazole 2% isn't working anymore thrice a week.